44643116721 has 16 divisors (see below), whose sum is σ = 69311147904. Its totient is φ = 25029024384.

The previous prime is 44643116711. The next prime is 44643116723. The reversal of 44643116721 is 12761134644.

It is not a de Polignac number, because 44643116721 - 2⁹ = 44643116209 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 44643116721.

It is not an unprimeable number, because it can be changed into a prime (44643116723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20054196 + ... + 20056421.

It is an arithmetic number, because the mean of its divisors is an integer number (4331946744).

Almost surely, 2^44643116721 is an apocalyptic number.

It is an amenable number.

44643116721 is a deficient number, since it is larger than the sum of its proper divisors (24668031183).

44643116721 is a wasteful number, since it uses less digits than its factorization.

44643116721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40110680.

The product of its digits is 96768, while the sum is 39.

The spelling of 44643116721 in words is "forty-four billion, six hundred forty-three million, one hundred sixteen thousand, seven hundred twenty-one".